A knife-wielding former employee went on a stabbing rampage at a residential care facility for the disabled in Kanagawa Prefecture west of Tokyo early Tuesday, killing at least 19 people and injuring 26 others, 20 of them seriously, police said.
Police arrested Satoshi Uematsu, 26, who drove to the Police Station and turned himself around 3 a.m. Tuesday, saying "I did it."
"It's better that the disabled disappear," the police quoted him as saying.
The attacker who said he was a former employee of the facility, had a bag full of knives and other edged tools, some bloodstained, when he turned himself in.
Local news Broadcasters said the man told police he had been fired and held a grudge against the care centre.
The police arrested him on suspicion of attempted murder and unlawful entry to a building.
The attack began in the early hours of the morning when Uematsu allegedly broke a first-floor window to get into the building. It is reported that he tied up caregivers before starting to stab the residents.
The facility is located about 50 kilometers from downtown Tokyo and is near private residences and an elementary school.
After the news about the stabbing rampage spread, families of the residents as well as neighbors of the facility flocked to the facility to get information about the residents' condition, saying they had received no information from the facility.
Japan has one of the lowest rates of violent crime in the developed world, and attacks involving weapons of any kind are unusual.
The killing is believed to be the worst such incident since 1938, when a man went on a killing spree armed with an axe, sword and rifle -- killing 30 people.